NCERT Exercise 4.4 - Chemical Bonding and Molecular Structure
Question: Draw Lewis structures for H2S, SiCl4, BeF2, CO3^2- and HCOOH.
Answer: H2S: H-S-H with two lone pairs on S; SiCl4: four single Si-Cl bonds; BeF2: F-Be-F; CO3^2-: three equivalent resonance forms with one C=O; HCOOH: H-C(=O)-O-H.
Full step-by-step NCERT solution with diagrams on Something by Zero.